Expert System for Analysis of Casting Defects - ESVOD

Elbel, T.; Králová, Yvetta; Hampl, Jiří

doi:10.1515/afe-2015-0004

Cited by 8 publications

(8 citation statements)

References 2 publications

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“…On the other hand, artificially modeled holes were used to simulate internal casting discontinuities such as middle porosity and casting voids. A detailed description of this type of defect can be found in the literature [ 28 , 29 , 30 , 31 ].…”

Section: Methodology Of Numerical Researchmentioning

confidence: 99%

Investigation of the Influence of Hot Forging Parameters on the Closing Conditions of Internal Metallurgical Defects in Zirconium Alloy Ingots

et al. 2023

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In this article, we present research results on the closing conditions of internal metallurgical discontinuities during the hot elongation operation of a Zr-1%Nb alloy ingot using physical and numerical modeling. Research on the influence of thermal and deformation parameters of elongation operations on the rheological behavior of a Zr-1% Nb alloy was conducted using the Gleeble 3800 metallurgical process simulator. Modeling of the influence of thermal–mechanical parameters of hot elongation operations in combinations of rhombic and flat anvils on the closure of metallurgical discontinuities was performed with the help of the FORGE®NxT 2.1 program. Based on the results of the research, recommendations were made regarding forging elongation technology and the geometry of working tools in order to ensure the closure of metallurgical discontinuities during hot elongation operations of Zr-1% Nb alloy ingots.

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Section: Methodology Of Numerical Researchmentioning

confidence: 99%

Investigation of the Influence of Hot Forging Parameters on the Closing Conditions of Internal Metallurgical Defects in Zirconium Alloy Ingots

et al. 2023

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“…The various directions and orientations of forces influenced the mechanism of welding of the foundry voids inside the deformed bars. Constant parameters of the forging operation were assumed, such as a forging initiation temperature of 950 • C, a value of relative compressionof 35%, and a value of the feed angleof 8 mm/s [23,24].…”

Section: Methodology Of Conducted Numerical Researchmentioning

confidence: 99%

“…Artificially modeled holes simulated internal casting discontinuities, such as central porosity and casting voids. Descriptions of these defects can be found in the literature [23][24][25][26].…”

Section: Methodology Of Conducted Numerical Researchmentioning

confidence: 99%

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Modeling of Closure of Metallurgical Discontinuities in the Process of Forging Zirconium Alloy

et al. 2023

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This article presents the results of testing the conditions of closing foundry voids during the hot forging operation of an ingot made of zirconium with 1% Nb alloy and use of physical and numerical modeling, continuing research presented in a previous thematically related article published in the journal Materials. The study of the impact of forging operation parameters on the rheology of zirconium with 1% Nb alloy was carried out on a Gleeble 3800 device. Using the commercial FORGE®NxT 2.1 program, a numerical analysis was performed of the influence of thermo-mechanical parameters of the hot elongation operation in trapezoidal flat and rhombic trapezoidal anvils on the closure of foundry voids. The analysis of the obtained test results was used to formulate recommendations on the technology of hot forging and the anvilgeometry, ensuring closure of foundry voids. Based on their research, the authors conclude that the shape of the deformation basin and the value and hydrostatic pressure have the greatest influences on the closure of foundry voids.

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“…This approach provided us with the average solidification rate according to Cho et al and will be referred to hence forth as the Cho model. For calculating the mean solidification rate we applied also a modified Chvorinov's rule [25,26]. This rule enables us to calculate solidification time for melt cast into a simple cylindrical mould by equation:…”

Section: Alloymentioning

confidence: 99%

Solidification of Al-Mn-based alloys under various processing parameters

Markoli

Leskovar

Zaky

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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A number of Al-Mn-based alloys were investigated with a view to their commercialization. Various casting techniques were used to affect the constitution of the alloys studied from crystalline to quasi-crystalline as well as other metastable states. Variations in cooling rates and chemical composition, along with other processing parameters, have been shown to allow us to control the final constitution and properties of what we believe could be the next generation of commercial Al-based alloys. Our research has shown that the solidification process of Al-Mn based alloys with additions of other metallic elements can lead to the formation of very complex final states, opening up possibilities for designing and controlling the properties of alloys. The solidification process in the alloys studied proved to be very complex, but can be explained by basic knowledge of the crystallisation of metallic melts. We have discovered that by changing the processing parameters and the chemical composition of the alloys in a controlled way, it is possible to tailor the final properties of the alloys, making them attractive for commercial purposes.

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Expert System for Analysis of Casting Defects - ESVOD

Cited by 8 publications

References 2 publications

Investigation of the Influence of Hot Forging Parameters on the Closing Conditions of Internal Metallurgical Defects in Zirconium Alloy Ingots

Investigation of the Influence of Hot Forging Parameters on the Closing Conditions of Internal Metallurgical Defects in Zirconium Alloy Ingots

Modeling of Closure of Metallurgical Discontinuities in the Process of Forging Zirconium Alloy

Solidification of Al-Mn-based alloys under various processing parameters

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